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Title: Pressure induced Ag2Te polymorphs in conjunction with topological non trivial to metal transition

Silver telluride (Ag2Te) is well known as superionic conductor and topologica insulator with polymorphs. Pressure induced three phase transitions in Ag2Te hav been reported in previous. Here, we experimentally identified high pressure phas above 13 GPa of Ag2Te by using high pressure synchrotron x ray diffraction metho in combination with evolutionary crystal structure prediction, showing it crystallize into a monoclinic structure of space group C2/m with lattice parameters a = 6.081Å b = 5.744Å, c = 6.797 Å, β = 105.53°. The electronic properties measurements of Ag2Te reveal that the topologically non-trivial semiconducting phase I and semimetalli phase II previously predicated by theory transformed into bulk metals fo high pressure phases in consistent with the first principles calculations
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [1] ;  [1] ;  [4] ;  [5] ;  [1] ;  [1] ;  [1] ;  [6]
  1. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics
  2. State Univ. of New York (SUNY), Stony Brook, NY (United States). Dept. of Geosciences
  3. Beijing Inst. of Technology, Beijing (China). Dept. of Physics
  4. Univ. of Nevada, Las Vegas, NV (United States). High Pressure Science and Engineering Center
  5. Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  6. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics; south Univ. of Science adn Technology of China, Guangdong (China)
Publication Date:
OSTI Identifier:
1332391
Grant/Contract Number:
NA0001982
Type:
Accepted Manuscript
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 6; Journal Issue: 8; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Research Org:
Univ. of Nevada, Las Vegas, NV (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY